Is this a real patent?

Yes — the original drawing as filed at the U.S. Patent Office, cleaned and printed. Public domain by law.

Printed in Europe on 200 g/m² matte paper. Small sizes ship flat, 50 × 70 ships rolled in a tube. Tracking by email.

What if it arrives damaged?

Send a photo within 7 days and we reprint and reship it free.

US 2,292,387Secret communication system1942

PD-60 · US 2,292,387

Name: Secret communication system Patent Print (1942)
Brand: PATENT DEPT.
SKU: PD-60
Availability: InStock

Hedy Lamarr's frequency-hopping patent, 1942 — the Hollywood star whose invention underpins Bluetooth and Wi-Fi.

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PD-60 · US 2,292,387 · Filed June 10, 1941 ·

Is this a real patent?: Yes — the original drawing as filed at the U.S. Patent Office, cleaned and printed. Public domain by law.
How is it shipped?: Printed in Europe on 200 g/m² matte paper. Small sizes ship flat, 50 × 70 ships rolled in a tube. Tracking by email.
What if it arrives damaged?: Send a photo within 7 days and we reprint and reship it free.